21233662 has 4 divisors (see below), whose sum is σ = 31850496. Its totient is φ = 10616830.

The previous prime is 21233651. The next prime is 21233689. The reversal of 21233662 is 26633212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5308414 + ... + 5308417.

It is an arithmetic number, because the mean of its divisors is an integer number (7962624).

Almost surely, 2^21233662 is an apocalyptic number.

21233662 is a deficient number, since it is larger than the sum of its proper divisors (10616834).

21233662 is a wasteful number, since it uses less digits than its factorization.

21233662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616833.

The product of its digits is 2592, while the sum is 25.

The square root of 21233662 is about 4607.9997829861. Note that the first 3 decimals coincide. The cubic root of 21233662 is about 276.9119088049.

Adding to 21233662 its reverse (26633212), we get a palindrome (47866874).

The spelling of 21233662 in words is "twenty-one million, two hundred thirty-three thousand, six hundred sixty-two".